Paper Info
Title
Performance analysis of two-dimensional optical code-division multiple-access systems using novel multi-code pulse-position modulation
Abstract
Previous works show that pulse-position modulation (PPM) is an effective signalling method for mitigating multiple-access interference, and hence is able to increase the number of users in two-dimensional (2-D) optical code-division multiple-access (OCDMA) systems. However, in order to achieve high bit-rates, 2-D OCDMA systems using PPM signalling require very high transmitted power because of the negative impact of dispersion. In this study, the authors propose a novel modulation technique of multi-code PPM (MCPPM), which is the combination of the PPM and multi-code modulation (MCM). As the proposed technique inherits advantages from both MCM (in mitigating the dispersion) and PPM, 2-D OCDMA systems using MCPPM signalling are able to support higher user bit-rates for a larger number of users at low transmitted powers. Numerical results show that 2-D OCDMA systems using 4-4-MCPPM can support 60 users with 5 Gbps per user at the transmitted power of 7 dBm. The power gain in this case is 11 dB compared to 2-D OCDMA systems using 4-PPM signalling. The proposed systems using 4-2-MCPPM can support as many as 36 users with the bit-rate of 10 Gbps per user and transmitted power is 2 dBm.
Year
DOI
Venue
2012
10.1049/iet-com.2011.0944
Communications, IET
Keywords
Field
DocType
code division multiple access,optical fibre communication,pulse position modulation,signalling,2D optical code-division multiple-access system,4-2-MCPPM,4-PPM signalling,MCPPM signalling,bit rate 10 Gbit/s,bit rate 5 Gbit/s,bit-rate,dispersion mitigation,multicode PPM,multicode modulation,multicode pulse-position modulation,multiple-access interference mitigation,performance analysis,signalling method
Multi code,Power gain,Dispersion (optics),Signalling,Pulse-position modulation,Computer network,Modulation,Interference (wave propagation),Code division multiple access,Mathematics
Journal
Volume
Issue
ISSN
6
15
1751-8628
Citations 
PageRank 
References 
0
0.34
6
Authors
2
Name
Order
Citations
PageRank
Ngoc T. Dang186.43
Anh T. Pham227740.14